CN217426822U - Winding equipment - Google Patents

Abstract

The utility model relates to a coiling equipment. The winding apparatus includes: the first pole piece unreeling device is used for unreeling a first pole piece downstream and has a first side surface and a second side surface which are deviated from each other; the first pole piece folding device is arranged at the downstream of the first pole piece unreeling device and comprises a first mounting frame, a first shaping roller and a second shaping roller which are parallel to each other and are rotatably arranged on the first mounting frame, a first rolling gap for the first pole piece and the pole lugs on the first pole piece to pass through is formed between the first shaping roller and the second shaping roller, and the first shaping roller and the second shaping roller jointly extrude the pole lugs on the first pole piece passing through the first rolling gap so as to bend the pole lugs on the first pole piece towards one side of the first pole piece with a second side surface; and the winding device is arranged at the downstream of the tab folding device and is provided with a winding needle for winding the first pole piece and forming the battery core.

Description

Winding equipment

Technical Field

The utility model relates to a battery manufacture equipment technical field especially relates to a coiling equipment.

Background

In the production process of the battery, especially for the cylindrical battery, in order to facilitate the welding of the current collecting disc, the tab of the winding-formed battery core needs to be bent inwards (generally, the tab needs to be bent by more than 60 degrees), so that the tab is prevented from influencing the welding of the current collecting disc. However, the tab of the battery cell is formed by overlapping a plurality of layers, so that the tab of the battery cell has large thickness and large bending difficulty, and the phenomenon of incomplete bending is easy to occur.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a winding apparatus for improving the above defects, aiming at the problems that the tab of the battery cell in the prior art is difficult to bend and is easy to bend.

A winding apparatus comprising:

the unwinding device of the first pole piece is used for outputting the first pole piece to downstream unwinding, and the first pole piece is provided with a first side surface and a second side surface which are deviated from each other;

the first pole piece folding device is arranged at the downstream of the first pole piece unreeling device and comprises a first mounting frame, a first shaping roller and a second shaping roller which are parallel to each other and are rotatably arranged on the first mounting frame, a first rolling gap for the first pole piece and the pole lugs on the first pole piece to pass through is formed between the first shaping roller and the second shaping roller, and the first shaping roller and the second shaping roller jointly extrude the pole lugs on the first pole piece passing through the first rolling gap so as to bend the pole lugs on the first pole piece towards one side of the first pole piece with the second side face; and

and the winding device is arranged at the downstream of the tab folding device and is provided with a winding needle for winding the first pole piece and forming the battery core.

In one embodiment, the first tab folding device further comprises a first guide block arranged on an upstream side of the first rolling gap;

first guide block has one and is used for leading the first guide face of leading to the utmost point ear on the first pole piece along the way, first guide face inclines relatively along the plane at first pole piece place along the way, the upstream end of first guide face is located first pole piece along the way and has one side of first side, the downstream end of first guide face is located first pole piece along the way has one side of second side.

In one embodiment, the first guide block further has a first guide surface connected to a downstream end of the first guide surface, the first guide surface being located on a side of the first pole piece passing by having the second side surface and being parallel to a plane on which the first pole piece passing by is located.

In one embodiment, the first tab folding device further comprises a first guide block arranged on the upstream side of the first rolling gap, the first guide block is provided with a first smooth curved surface in sliding fit with the tab on the passing first pole piece, and the first smooth curved surface is used for gradually guiding the passing tab to incline towards the side, with the second side, of the first pole piece.

In one embodiment, the winding apparatus further comprises a second pole piece unwinding device and a second tab folding device, the second pole piece unwinding device is arranged upstream of the winding device and is used for unwinding and outputting a second pole piece to the winding device, and the second pole piece has a third side surface and a fourth side surface which face away from each other;

the second pole piece device of folding arrange in the second pole piece put the coiling mechanism with between the coiling mechanism, and include the second mounting bracket and be parallel to each other and all rotationally set up third shaping roller and fourth shaping roller on the second mounting bracket, third shaping roller with form the second roll pressure clearance that supplies the utmost point ear on second pole piece and the second pole piece to pass through between the fourth shaping roller, third shaping roller with fourth shaping roller extrudees jointly by utmost point ear on the second pole piece that the second roll pressure clearance passes through to have utmost point ear on the second pole piece towards the second pole piece one side bending of fourth side.

In one embodiment, the second tab arrangement further comprises a second guide block arranged upstream of the second rolling nip;

the second guide block is provided with a second guide surface used for guiding the electrode lug passing through the second pole piece, the second guide surface is inclined relative to the plane where the passing through second pole piece is located, the upstream end of the second guide surface is located on the side, provided with the third side face, of the passing through second pole piece, and the downstream end of the second guide surface is located on the side, provided with the fourth side face, of the passing through second pole piece.

In one embodiment, the second guide block further has a second guide surface connected to a downstream end of the second guide surface, the second guide surface being located on a side of the routed second pole piece having the fourth side surface and being parallel to a plane on which the routed second pole piece is located.

In one embodiment, the second tab folding device further comprises a second guide block arranged on the upstream side of the second rolling gap, the second guide block is provided with a second smooth curved surface in sliding fit with the tab on the passing second tab, and the second smooth curved surface is used for gradually guiding the passing tab to incline towards one side of the second tab with a fourth side surface.

In one embodiment, the winding device further comprises an air blowing device arranged corresponding to the winding needle, and the air blowing device is used for blowing air to the tab at the end of the battery cell on the winding needle so as to provide pressure for bending the tab at the end of the battery cell inwards.

In one embodiment, the air blowing device comprises a position adjusting mechanism and an air blowing piece mounted on the position adjusting mechanism, and the position adjusting mechanism can adjust the distance between the air blowing piece and the winding needle in the radial direction to gradually increase according to the radial dimension of the battery core on the winding needle.

In one embodiment, the position adjusting mechanism comprises a fixed seat, a movable seat, a pressing roller and an elastic piece;

the moving seat is movably connected to the fixed seat, the air blowing piece is installed on the moving seat, and the abutting roller is rotatably connected to the moving seat and used for abutting against the winding needle;

the movable seat can drive the pressing roller and the air blowing piece to be close to or far away from the winding needle, and the elastic piece is connected with the fixed seat and the movable seat to provide pre-tightening force for driving the pressing roller and the air blowing piece to be close to the moving trend of the winding needle.

In one embodiment, the winding equipment further comprises a battery cell blanking device, a conveying line and a flattening device;

the battery cell blanking device is used for blanking the battery cell on the winding needle to the conveying line, and the conveying line is used for conveying the battery cell;

the flattening device further comprises a fixing frame arranged on the conveying line and two flattening assemblies arranged on the fixing frame, and a flattening channel for a power supply core to pass through is formed between the two flattening assemblies;

two one side that the subassembly that flattens each other moves towards all has a pressure head, and two the subassembly that flattens the pressure head can be close to each other with controlling to compress tightly the way the both ends of the electric core of passageway flatten, in order to utilize two the pressure head flattens the utmost point ear at electric core both ends respectively.

In one embodiment, the flattening device further includes a clamping assembly mounted on the fixing frame, and the clamping assembly is used for clamping and fixing the battery cell passing through the flattening channel.

According to the winding equipment, during actual winding operation, the first pole piece unwinding device conveys the first pole piece downstream, when the first pole piece passes through a first rolling gap between a first shaping roller and a second shaping roller of the first pole piece folding device, the pole lug on the first pole piece is extruded by the first shaping roller and the second shaping roller, so that the pole lug is bent towards the second side face of the first pole piece, and the bending of the pole lug on the first pole piece in the way is finished. And continuously conveying the first pole piece subjected to the tab bending to the downstream until the first pole piece is wound on a winding needle of a winding device, so that a battery core is formed by winding on the winding needle. Because the tabs of the first pole piece are bent before entering the winding needle, the tabs of all layers of the battery cell on the winding needle have inward bending pre-bending angles, and the root parts of the tabs have creases, so that the tabs on the battery cell are more easily bent to a required angle (for example, more than 60 degrees) in a subsequent bending process, and the subsequent process difficulty of bending the tabs on the battery cell is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a winding apparatus according to an embodiment of the present invention;

fig. 2 is a front view of a first tab device of the winding apparatus shown in fig. 1;

fig. 3 is a side view of the first tab folding device shown in fig. 2;

fig. 4 is a front view of a second tab folding device of the winding apparatus shown in fig. 1;

fig. 5 is a side view of the second tab apparatus shown in fig. 4;

FIG. 6 is a schematic view showing the structure of an air blowing device of the winding apparatus shown in FIG. 1;

FIG. 7 is a schematic view of the flattening apparatus of the winding apparatus shown in FIG. 1;

figure 8 is a schematic diagram of the configuration of the ram of the flattening assembly of the flattening apparatus shown in figure 7.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1 to 3, an embodiment of the present invention provides a winding apparatus, including a first pole piece unwinding device 10a, a first tab folding device 30a and a winding device 20.

The first pole piece unwinding device 10a is configured to unwind the first pole piece a downstream, and the first pole piece a has a first side and a second side that face away from each other. The first tab folding device 30a is disposed downstream of the first pole piece unwinding device 10a, and includes a first mounting frame 31a, and a first shaping roller 32a and a second shaping roller 33a which are parallel to each other and are both rotatably disposed on the first mounting frame 31 a. A first roll gap a through which the first pole piece a and the tab on the first pole piece a pass is formed between the first shaping roll 32a and the second shaping roll 33 a. The first shaping roller 32a and the second shaping roller 33a jointly press the tab on the first pole piece a passing through the first rolling gap a, so as to bend the tab on the first pole piece a toward the second side surface. The winding device 20 is arranged downstream of the first tab device 30a and has a winding needle 21 for winding the first pole piece a and forming a cell.

In the winding device, during actual winding operation, the first pole piece unwinding device 10a conveys the first pole piece a downstream, and when the first pole piece a passes through a first rolling gap a between a first shaping roller 32a and a second shaping roller 33a of the first pole piece folding device 30a, the pole lugs on the first pole piece a are extruded by the first shaping roller 32a and the second shaping roller 33a, so that the pole lugs are bent towards the second side surface of the first pole piece a, that is, the bending of the pole lugs on the first pole piece a in the way is completed. The first pole piece a after the tab bending is continuously conveyed downstream until being wound on the winding needle 21 of the winding device 20, so that the battery cell is wound on the winding needle 21. Because the tabs of the first pole piece a are already bent before entering the winding needle 21, each layer of tabs of the battery cell on the winding needle 21 has a pre-bending angle which is bent inwards, and the root of each tab has a crease, so that the tabs on the battery cell are more easily bent to a required angle (for example, more than 60 degrees) in a subsequent bending process, thereby reducing the subsequent process difficulty of bending the tabs on the battery cell.

In the embodiment of the present invention, the first shaping roller 32a has the first main body segment 321a and the first shaping segment 322a arranged along the axial direction thereof, and the second shaping roller 33a has the second main body segment 331a and the second shaping segment 332a arranged along the axial direction thereof. The first main body segment 321a and the second main body segment 331a form therebetween a first sub-rolling gap a1 for the first pole piece a to pass through. The first shaping section 322a and the second shaping section 332a form a first shaping gap a2 for the tab on the first pole piece a to pass through. The roller surface of the first shaping section 322a and the roller surface of the second shaping section 332a jointly press the tab on the first pole piece a in the way, so as to bend the tab. It is understood that the first sub roll nip a1 and the first shaping nip a2 in combination form the first roll nip a described above.

It should be noted that the first sub-rolling gap a1 is smaller (slightly smaller than the thickness of the first pole piece a), so that the roller surface of the first main body segment 321a and the roller surface of the second main body segment 331a roll the first pole piece a passing through the first sub-rolling gap a1 together (that is, the roller surface of the first main body segment 321a and the roller surface of the second main body segment 331a respectively apply pressing forces to two sides of the first pole piece a), so that the first pole piece a drives the first shaping roller 32a and the second shaping roller 33a to rotate in opposite directions to each other, and pass through the first sub-rolling gap a1 smoothly. The first shaping gap a2 is small (slightly smaller than the thickness of the tab), so that the roller surface of the first shaping segment 322a and the roller surface of the second shaping segment 332a roll the tab passing through the first shaping gap a2 together (namely, the roller surface of the first shaping segment 322a and the roller surface of the second shaping segment 332a apply extrusion force to the two sides of the tab respectively), and the tab is bent along the roller surface of the first shaping segment 322a and the roller surface of the second shaping segment 332a, namely, the tab on the first pole piece a passing through is bent.

In particular embodiments, the first shaping segment 322a gradually increases in radial dimension from proximate the first body segment 321a to a direction away from the first body segment 321 a. The second shaping segment 332a gradually decreases in radial dimension from near the second body segment 331a to a direction away from the second body segment 331 a. So, utilize the roll surface of first plastic section 322a and the roll surface of second plastic section 332a to inject the utmost point ear on way for utmost point ear produces the bending towards the second side relatively first pole piece a. In this embodiment, the first side of the first pole piece a passing through the first sub-rolling nip a1 faces the first shaping roller 32a, and the second side faces the second shaping roller 33 a.

Note that an angle formed between the roller surface of the first shaping section 322a and the roller surface of the first main body section 321a is a first angle. The angle formed between the roller surface of the second shaping segment 332a and the roller surface of the second body segment 331a is a second angle, which is substantially equal to the first angle.

In some embodiments, the first shaping roller 32a may be controlled to approach or move away toward the second shaping roller 33 a. Thus, when the tab on the first pole piece a needs to be bent, the first shaping roller 32a is controlled to move close to the second shaping roller 33a until the first shaping roller 32a and the second shaping roller 33a jointly extrude the tab of the first pole piece a, and the tab is bent towards the second side surface relative to the first pole piece a under the limiting action of the roller surface of the first shaping section 322a and the roller surface of the second shaping section 332 a. When the tab is not required to be bent, the first shaping roller 32a is controlled to move away from the second shaping roller 33a, so that sufficient space is reserved between the first shaping roller 32a and the second shaping roller 33a, and the threading or maintenance is facilitated.

In an embodiment, the first tab folding device 30a further includes a first lifting driving element 36a and a first mounting seat 35 a. The first lifting driving member 36a is mounted on the first mounting frame 31a and is in driving connection with the first mounting seat 35a, and the first shaping roller 32a is rotatably connected to the first mounting seat 35 a. The first lifting driving member 36a can drive the first mounting seat 35a to move, so as to drive the first shaping roller 32a to approach or separate from the second shaping roller 33a along the first direction X. Alternatively, the first elevation driving part 36a may employ a cylinder.

Further, the first tab folding device 30a further includes a first adjusting seat 37a, and the first adjusting seat 37a is disposed on the first mounting frame 31a and is adjustable with respect to the first mounting frame 31a in a position in a second direction Y, which is perpendicular to the first direction X. It is understood that the first direction X is perpendicular to the axial direction of the first shaping roller 32a and the second shaping roller 33a, and the second direction Y is parallel to the axial direction of the first shaping roller 32a and the second shaping roller 33 a. The first lifting driving member 36a is installed on the first adjusting seat 37a and is in driving connection with the first installation seat 35a to drive the first installation seat 35a to move along the first direction X, so that the first installation seat 35a drives the first shaping roller 32a to approach or depart from the second shaping roller 33 a. In this manner, the position of the first shaping roller 32a relative to the second shaping roller 33a in the second direction Y can be adjusted by the first adjustment seat 37a to accurately align the first shaping segment 322a and the second shaping segment 332 a.

Further, the first tab folding device 30a further includes a first locking member (not shown), the first mounting frame 31a has a first kidney-shaped hole 311a extending lengthwise along the second direction Y, and the first adjusting seat 37a has a first mounting hole 371 a. The first locking member is inserted through the first kidney-shaped hole 311a and the first mounting hole 371a, and locks or unlocks the first adjusting seat 37a and the first mounting bracket 31 a. In this way, when the position of the first shaping roller 32a relative to the second shaping roller 33a in the second direction Y needs to be adjusted, the first locking member releases the first adjusting seat 37a and the first mounting frame 31a, so as to push the first adjusting seat 37a to move along the first kidney-shaped hole 311a, and further drive the first shaping roller 32a to move in the second direction Y. When the first shaping roller 32a is adjusted in position, the first locking member locks the first adjustment seat 37a and the first mounting bracket 31a so that the first adjustment seat 37a cannot move along the first kidney-shaped hole 311a, i.e., the position of the first shaping roller 32a relative to the second shaping roller 33a in the second direction is fixed. Alternatively, the first locking member may be a bolt.

In some embodiments, the first tab device 30a further includes a first guide block 34a disposed on an upstream side of the first roll nip a. The first guide block 34a has a first guide surface 341a for guiding the tab on the first pole piece a that is routed. The first guide surface 341a is inclined with respect to the plane on which the first pole piece a passes, the upstream end of the first guide surface 341a is located on the side of the first pole piece a having the first side surface, and the downstream end of the first guide surface 341a is located on the side of the first pole piece a having the second side surface. In this way, during the first pole piece a passes through the first guide block 34a, the tab on the first pole piece a firstly enters the first guide surface 341a, then contacts the first guide surface 341a, inclines toward the side of the first pole piece a having the second side surface under the pressing action of the first guide surface 341a, and finally enters the first shaping gap a2 between the first shaping section 322a and the second shaping section 332 a. It should be noted that, the tab on the first pole piece a is pre-bent by using the first guide surface 341a of the first guide block 34a, so that the tab is in an inclined state that the tab inclines toward the side of the first pole piece a having the second side surface, and then enters the first shaping gap a2 to be bent, thereby preventing the tab from being torn and damaged when directly entering the first shaping gap a2 to be bent.

Further, the first guide block 34a further has a first guide surface 342a connected to the downstream end of the first guide surface 341a, and the first guide surface 342a is located on the side of the first pole piece a having the second side surface and parallel to the plane of the first pole piece a. So, being provided with of first spigot surface 342a does benefit to the improvement to the effect of buckling in advance of utmost point ear, ensures that utmost point ear is buckled in entering into first plastic clearance A2 with the tilt state, is torn and damages when further avoiding utmost point ear direct entry to buckle in the first plastic clearance A2.

Note that, when the first pole piece a passes through the first guide block 34a in a horizontal state, and the second side of the first pole piece a faces downward: the first guide surface 341a is inclined with respect to the horizontal plane (i.e. inclined with respect to the plane on which the first pole piece a passes), the upstream end of the first guide surface 341a is higher than the first pole piece a, and the downstream end of the first guide surface 341a is lower than the first pole piece a, so that the first guide surface 341a can guide the passing pole ear to be inclined downward (i.e. inclined toward the side on which the first pole piece a passes and has the second side surface). The first guiding surface 342a is parallel to the horizontal plane (i.e. parallel to the plane of the passing first pole piece a), and the first guiding surface 342a is lower than the first pole piece a (i.e. the first guiding surface 342a is located on the side of the passing first pole piece a having the second side surface). In this way, the tab of the first pole piece a first enters the first guide surface 341a, then contacts the first guide surface 341a, gradually inclines downward by the pressing action of the first guide surface 341a, and then enters the first guide surface 342 a. The first guide surface 342a can keep the tab of the passing first pole piece a in a downward inclined state, and then enter the first shaping gap a2 to complete bending.

In further embodiments, the first tab arrangement 30a further comprises a first guide block 34a arranged on the upstream side of the first roll gap a. This first guide block 34a has with utmost point ear sliding fit's on the first pole piece a of passing through first smooth curved surface, and this first smooth curved surface is used for leading gradually to one side slope that has the second side towards first pole piece a with utmost point ear of passing through. Alternatively, the first smooth curved surface may be a smooth three-dimensional curved surface, for example, a similar spiral curved surface, as long as the tab sliding along the first smooth curved surface can be gradually guided to incline toward the side of the first pole piece a having the second side surface, which is not limited herein.

So, first pole piece a is via the in-process of first guide block 34a, and first smooth curved surface is followed to first pole piece a's utmost point ear to slide, and have the one side slope of second side towards first pole piece a gradually under the guiding action of first smooth curved surface, thereby ensure that utmost point ear is buckled in entering into first plastic clearance A2 with the tilt state, avoid utmost point ear direct entering into and is buckled by the tear and damage in the first plastic clearance A2. It can be understood that the first smooth curved surface is utilized to guide the pole lug, so that the resistance of the pole lug moving downstream is reduced, and the pole lug is further prevented from being damaged.

Referring to fig. 1, 4 and 5, in an embodiment of the present invention, the winding apparatus further includes a second tab unwinding device 10b and a second tab folding device 30 b. The second pole piece unwinding device 10b is disposed upstream of the winding device 20, and is configured to unwind the second pole piece b to the winding device 20. The second pole piece b has a third side and a fourth side facing away from each other.

The second tab terminal device 30b is disposed between the second pole piece unwinding device 10b and the winding device 20, and the second tab terminal device 30b includes a second mounting frame 31b, and a third shaping roller 32b and a fourth shaping roller 33b which are parallel to each other and are rotatably disposed on the second mounting frame 31 b. A second rolling gap B through which the second pole piece B and the tab on the second pole piece B pass is formed between the third shaping roller 32B and the fourth shaping roller 33B. The third shaping roller 32B and the fourth shaping roller 33B jointly press the tab on the second pole piece B passing through the second rolling gap B, so as to bend the tab on the second pole piece B toward the fourth side surface.

In the winding device, during actual winding operation, the first pole piece unwinding device 10a conveys the first pole piece a downstream, and when the first pole piece a passes through a first rolling gap a between a first shaping roller 32a and a second shaping roller 33a of the first pole piece folding device 30a, the pole lugs on the first pole piece a are extruded by the first shaping roller 32a and the second shaping roller 33a, so that the pole lugs are bent towards the second side surface of the first pole piece a, that is, the bending of the pole lugs on the first pole piece a in the way is completed. Simultaneously, second pole piece unwinding device 10B carries second pole piece B downstream, and this second pole piece B is when passing through second shaping roller 32B and the second roll pressure clearance B between fourth shaping roller 33B of second pole piece device 30B, and utmost point ear on the second pole piece B is extruded by third shaping roller 32B and fourth shaping roller 33B for utmost point ear is buckled towards the fourth side of second pole piece B, accomplishes buckling to the utmost point ear on the second pole piece B of route promptly.

The first pole piece a and the second pole piece b after the tab bending are continuously conveyed to the downstream until being wound on the winding needle 21 of the winding device 20, so that the battery core is wound on the winding needle 21. Because the tabs on the first pole piece a and the second pole piece b are bent before entering the winding needle 21, the tabs on the first pole piece a and the second pole piece b have pre-bending angles bending inwards at the two ends of the battery cell on the winding needle 21, and the root parts of the tabs have creases, so that the tabs on the battery cell are more easily bent to a required angle (for example, more than 60 degrees) in the subsequent bending process, thereby reducing the subsequent process difficulty of bending the tabs on the battery cell. It is understood that the root of the tab refers to a portion where the tab is connected with the first or second pole piece a or b.

In the embodiment of the present invention, the third shaping roller 32b has the third main body segment 321b and the third shaping segment 322b arranged along the axial direction thereof, and the fourth shaping roller 33b has the fourth main body segment 331b and the fourth shaping segment 332b arranged along the axial direction thereof. A second sub-roll gap B1 is formed between the third main body segment 321B and the fourth main body segment 331B for the second pole piece B to pass through. A second shaping gap B2 for the tab of the second pole piece B to pass through is formed between the third shaping section 322B and the fourth shaping section 332B. The roll surface of the third shaping section 322b and the roll surface of the fourth shaping section 332b co-extrude the tab on the second tab b in the path to bend the tab. It is understood that the second sub-rolling nip B1 and the second shaping nip B2 form the second rolling nip B in combination.

It should be noted that the second sub-rolling gap B1 is smaller (slightly smaller than the thickness of the second pole piece B), so that the roller surface of the third main body segment 321B and the roller surface of the fourth main body segment 331B roll the second pole piece B passing through the second sub-rolling gap B1 together (that is, the roller surface of the third main body segment 321B and the roller surface of the fourth main body segment 331B respectively apply pressing forces to two sides of the second pole piece B), so that the second pole piece B drives the third shaping roller 32B and the fourth shaping roller 33B to rotate in opposite directions to each other to smoothly pass through the second sub-rolling gap B1. The second shaping gap B2 is small (slightly smaller than the thickness of the tab), so that the roller surface of the third shaping section 322B and the roller surface of the fourth shaping section 332B roll the tab passing through the second shaping gap B2 together (namely, the roller surface of the third shaping section 322B and the roller surface of the fourth shaping section 332B apply extrusion force to the two sides of the tab respectively), and the roller surface of the tab along the third shaping section 322B and the roller surface of the fourth shaping section 332B are bent, namely, the tab on the passing second tab B is bent.

In particular embodiments, the third shaping segment 322b gradually increases in radial dimension from proximate the third body segment 321b to away from the third body segment 321 b. The fourth shaping segment 332b gradually decreases in radial dimension from near the fourth body segment 331b to a direction away from the fourth body segment 331 b. In this way, the passing tab is defined by the roller surface of the third shaping section 322b and the roller surface of the fourth shaping section 332b, so that the tab is bent toward the side having the fourth side surface with respect to the second tab b. In this embodiment, the third side of the second pole piece B passing through the second sub-rolling nip B1 faces the third shaping roller 32B, and the fourth side faces the fourth shaping roller 33B.

Note that an angle formed between the roller surface of the third shaping section 322b and the roller surface of the third main body section 321b is a third angle. An angle formed between the roller surface of the fourth shaping segment 332b and the roller surface of the fourth main segment 331b is a fourth angle, and the third angle is substantially equal to the fourth angle.

In some embodiments, the third shaping roller 32b may be controlled to approach or move away toward the fourth shaping roller 33 b. In this way, when the tab on the second tab b needs to be bent, the third shaping roller 32b is controlled to move close to the fourth shaping roller 33b until the third shaping roller 32b and the fourth shaping roller 33b jointly extrude the tab of the second tab b, and the tab is bent toward the fourth side relative to the second tab b under the limiting action of the roller surface of the third shaping section 322b and the roller surface of the fourth shaping section 332 b. When the tab is not required to be bent, the third shaping roller 32b is controlled to move away from the fourth shaping roller 33b, so that sufficient space is reserved between the third shaping roller 32b and the fourth shaping roller 33b, and the threading or maintenance is facilitated.

In an embodiment, the second tab folding device 30b further includes a second lifting driving element 36b and a second mounting seat 35 b. The second lifting driving member 36b is mounted on the second mounting frame 31b and is in driving connection with the second mounting seat 35b, and the third shaping roller 32b is rotatably connected to the second mounting seat 35 b. The second lifting driving member 36b can drive the second mounting seat 35b to move, so as to drive the third shaping roller 32b to approach or separate from the fourth shaping roller 33b along the third direction U. Alternatively, the second elevation driving part 36b may employ a cylinder.

Further, the second tab terminal device 30b further includes a second adjusting seat 37b, the second adjusting seat 37b is disposed on the second mounting frame 31b and is adjustable with respect to the second mounting frame 31b in a fourth direction V, and the fourth direction V is perpendicular to the third direction U. It is understood that the third direction U is perpendicular to the axial direction of the third shaping roller 32b and the fourth shaping roller 33b, and the fourth direction V is parallel to the axial direction of the third shaping roller 32b and the fourth shaping roller 33 b. The second lifting driving member 36b is installed on the second adjusting seat 37b and is in driving connection with the second installation seat 35b to drive the second installation seat 35b to move along the third direction U, so that the second installation seat 35b drives the third shaping roller 32b to approach or depart from the fourth shaping roller 33 b. In this manner, the position of the third shaping roller 32b in the fourth direction V relative to the fourth shaping roller 33b can be adjusted by the second adjusting seat 37b to accurately align the third shaping segment 322b and the fourth shaping segment 332 b.

Further, the second tab folding device 30b further includes a second locking member (not shown), the second mounting frame 31b has a second waist-shaped hole 311b longitudinally extending along the fourth direction V, and the second adjusting seat 37b has a second mounting hole 371 b. The second locking member is inserted through the second kidney-shaped hole 311b and the second mounting hole 371b, and locks or unlocks the second adjusting seat 37b and the second mounting bracket 31 b. Thus, when the position of the third shaping roller 32b relative to the fourth shaping roller 33b in the fourth direction V needs to be adjusted, the second locking member releases the second adjusting seat 37b and the second mounting bracket 31b, so as to push the second adjusting seat 37b to move along the second kidney-shaped hole 311b, and further drive the third shaping roller 32b to move along the fourth direction V. When the third shaping roller 32b is adjusted to the right position, the second locking member locks the second adjusting seat 37b and the second mounting bracket 31b, so that the second adjusting seat 37b cannot move along the second kidney-shaped hole 311b, and the third shaping roller 32b is fixed in position in the fourth direction V relative to the fourth shaping roller 33 b. Alternatively, the second locking member may be a bolt.

In some embodiments, the second tab arrangement 30B further comprises a second guide block 34B arranged on the upstream side of the second rolling gap B. The second guide block 34b has a second guide surface 341b for guiding the tab on the second pole piece b passing by. The second guide surface 341b is inclined with respect to the plane on which the second pole piece b passes, the upstream end of the second guide surface 341b is located on the side of the second pole piece b having the third side surface, and the downstream end of the second guide surface 341b is located on the side of the second pole piece b having the fourth side surface. In this way, when the second pole piece B passes through the second guide block 34B, the tab on the second pole piece B firstly enters the second guide surface 341B, then contacts the second guide surface 341B, bends toward the side of the second pole piece B having the fourth side surface under the pressing action of the second guide surface 341B, and finally enters the second shaping gap B2 between the third shaping section 322B and the fourth shaping section 332B. The tab on the second pole piece B is pre-bent by using the second guide surface 341B of the second guide block 34B, so that the tab is in an inclined state inclined towards the side of the second pole piece B having the fourth side surface, and then enters the second shaping gap B2 to be bent, thereby avoiding the tab from being torn and damaged when directly entering the second shaping gap B2 to be bent.

Further, the second guide block 34b also has a second guide surface 342b connected to a downstream end of the second guide surface 341b, and the second guide surface 342b is located on a side of the second pole piece b passing by having the fourth side surface and is parallel to a plane on which the second pole piece b passing by is located. So, the effect of buckling in advance of utmost point ear is favorable to improving to being provided with of second spigot surface 342B, ensures that utmost point ear enters into second plastic clearance B2 with the tilt state and buckles, is torn and damages when further avoiding utmost point ear directly to enter into second plastic clearance B2 and buckle.

Note that, in the case where the second pole piece b passes through the second guide block 34b in a horizontal state, and the fourth side of the second pole piece b faces downward: the second guide surface 341b is inclined with respect to a horizontal plane (i.e., inclined with respect to a plane on which the second pole piece b passes), and an upstream end of the second guide surface 341b is higher than the second pole piece b passing therethrough, and a downstream end of the second guide surface 341b is lower than the second pole piece b passing therethrough, so that the second guide surface 341b can guide the tab passing therethrough to be inclined downward (i.e., inclined toward a side of the second pole piece b having a fourth side surface). The second guiding surface 342b is parallel to the horizontal plane (i.e. parallel to the plane where the second pole piece b passes through), and the second guiding surface 342b is lower than the second pole piece b passing through (i.e. the second guiding surface 342b is located on the side where the second pole piece b passes through and has the fourth side surface). In this way, the tab of the second tab b first enters the second guide surface 341b, then comes into contact with the second guide surface 341b, gradually inclines downward by the pressing action of the second guide surface 341b, and then enters the second guide surface 342 b. The second guide surface 342B can keep the tab of the passing second pole piece B in a downward inclined state, and then enter the second shaping gap B2 to complete bending.

In further embodiments, the second tab arrangement 30B further comprises a second guide block 34B arranged upstream of the second rolling nip B. This second guide block 34b has with utmost point ear sliding fit's on the second pole piece b of passing through smooth curved surface of second, and this smooth curved surface of second is used for leading gradually to the one side slope that has the fourth side towards second pole piece b with utmost point ear of passing through. Alternatively, the second smooth curved surface may be a smooth three-dimensional curved surface, for example, a spiral-like curved surface, as long as the tab sliding along the second smooth curved surface can be gradually guided to incline toward the side of the second tab b having the fourth side surface, which is not limited herein.

So, second pole piece B is through the in-process of second guide block 34B, and second pole piece B's utmost point ear slides along the smooth curved surface of second to one side slope that has the fourth side towards second pole piece B gradually under the guiding action of the smooth curved surface of second, thereby ensure that utmost point ear is buckled in entering into second plastic clearance B2 with the tilt state, avoid utmost point ear directly to get into and is torn and damage when buckling in the second plastic clearance B2. It can be understood that the second smooth curved surface is utilized to guide the tab, so that the resistance of the tab moving downstream is reduced, and the tab is further prevented from being damaged.

Please refer to fig. 1 and fig. 6, in an embodiment of the present invention, the winding apparatus further includes an air blowing device 90 disposed corresponding to the winding needle 21, the air blowing device 90 is configured to blow air to the tab of the end portion of the electrical core D on the winding needle 21, so as to provide a pressure for bending the tab of the end portion of the electrical core D inwards. So, at the in-process that the book needle 21 convoluteed, utilize gas blowing device 90 to blow to the utmost point ear of the electric core D tip on the book needle 21 for utmost point ear on the electric core D keeps the state of inwards buckling, reduces the resilience at the in-process utmost point ear of convoluteing. It should be noted that the air blowing device 90 blows air towards the connection between the tab and the end of the electrical core D, so that the tab is kept in an inward bending state in the winding process, and the tab is prevented from rebounding outwards.

In the embodiment, the air blowing device 90 includes a position adjusting mechanism 92 and an air blowing member 91 mounted on the position adjusting mechanism 92. The position adjusting mechanism 92 can gradually increase the radial dimension of the battery cell D on the winding needle 21, and the distance between the air blowing piece 91 and the winding needle 21 in the radial direction gradually increases. Thus, in the winding process, the radial dimension of the battery cell D on the winding needle 21 is gradually increased, and the position adjusting mechanism 92 adjusts the distance between the blowing piece 91 and the winding needle 21 in the radial direction to be gradually increased, so as to ensure that the distance between the blowing piece 91 and the tab of the outer ring of the battery cell D is kept unchanged (or changed sufficiently small), further ensure that the airflow blown out by the blowing piece 91 can apply more stable pressure to the tab, and avoid the occurrence of too large or too small pressure applied to the tab.

In one embodiment, the position adjusting mechanism 92 includes a fixed seat 921, a movable seat 922, an abutting roller 923 and an elastic member 924. The movable base 922 is movably connected to the fixed base 921, and the air blowing member 91 is installed on the movable base 922 so that the air blowing member 91 can move along with the movable base 922. The pressing roller 923 is rotatably connected to the moving base 922 for pressing against the winding needle 21. The moving seat 922 can drive the pressing roller 923 and the air blowing piece 91 to be close to or far away from the winding needle 21. The elastic member 924 is connected to the fixing seat 921 and the moving seat 922, so as to provide a pre-tightening force that the moving seat 922 drives the pressing roller 923 and the blowing member 91 to move close to the winding needle 21.

So, book needle 21 is at the coiling in-process, support compression roller 923 and support under the pretension effect that elastic component 924 provided and lean on book needle 21 (namely electric core D is located book needle 21 and supports between compression roller 923), along with the radial dimension crescent of electric core D on book needle 21, support compression roller 923 and roll up the clearance between the needle 21 and increase gradually, support compression roller 923 drive and remove seat 922 and keep away from book needle 21 gradually, remove seat 922 and drive the piece of blowing 91 and keep away from book needle 21 gradually again, thereby ensure that the distance of the utmost point ear of piece 91 and electric core D outer lane of blowing keeps unchanged roughly. Alternatively, the resilient member 924 may be a spring or a cylinder.

It should be noted that the pressing roller 923 plays a role in driving the blowing member 91 to gradually get away from the winding needle 21 along with the gradual increase of the diameter of the electric core D, so that the distance between the blowing member 91 and the tab of the outer ring of the electric core D is approximately kept unchanged; on the other hand, the pressing roller 923 is always kept to abut against the battery cell D on the winding needle 21 in the winding process of the winding needle 21, so as to compact the battery cell D.

Further, be provided with slide rail 925 on the fixing base 921, remove seat 922 sliding connection on this slide rail 925 to utilize this slide rail 925 to lead the removal of removing seat 922 relative fixing base 921, make to press roller 923 and the removal of blowing piece 91 more reliable and more stable.

Further, the position adjusting mechanism 92 further comprises a moving driving assembly (not shown) which is drivingly connected with the fixing base 921 to drive the fixing base 921 to move between the working position and the avoiding position. When the fixing base 921 moves to the working position, the pressing roller 923 is pressed against the winding needle 21. When the fixing base 921 moves to the avoiding position, the pressing roller 923 is kept away from the winding needle 21, so that the winding needle 21 can move to other stations. Alternatively, the moving driving assembly may adopt a linear driving mechanism or an oscillating driving mechanism, which is not limited herein.

It should be noted that the air blowing piece 91 gradually increases according to the radial dimension of the battery cell D and moves away from the winding needle 21, and the movement is not limited to be realized by driving the air blowing piece 91 by the pressing roller 923. In other embodiments, the air blowing piece 91 may be directly connected to the moving driving assembly in a driving manner, and the moving driving assembly drives the air blowing piece 91 to move closer to or away from the winding needle 21 substantially along the radial direction of the winding needle 21, so that the distance between the air blowing piece 91 and the tab of the outer ring of the battery cell D is kept substantially constant during the winding process.

Referring to fig. 1, fig. 7 and fig. 8, in an embodiment of the present invention, the winding apparatus further includes a battery cell blanking device 40, a conveying line 50 and a pressing device 60. The battery cell blanking device 40 is used for blanking the battery cell on the winding needle 21 to the conveying line 50, and the conveying line 50 is used for conveying the battery cell. The flattening device 60 further comprises a fixed frame 61 mounted on the conveying line 50 and two flattening assemblies 62 mounted on the fixed frame 61, wherein a flattening channel for the power core to pass through is formed between the two flattening assemblies 62;

two one sides that flatten subassembly 62 and move towards each other all have a pressure head 622, and two pressure heads 622 that flatten subassembly 62 can be close to each other by controlled, and compress tightly the both ends of passing through the electric core of passageway that flattens, flatten with the utmost point ear of utilizing these two pressure heads 622 respectively at electric core both ends, make the utmost point ear at electric core both ends all inwards buckle to the terminal surface laminating with electric core, and then make two pressure heads 622 remove the utmost point ear back of flattening to electric core D both ends, the utmost point ear at electric core D both ends also can keep inwards buckling required angle (for example be greater than 60 °) the state.

In a specific embodiment, each pressing head 622 has a receiving groove 6221 on a side facing the flattening channel for receiving a tab at the end of the cell. The bottom wall of the accommodation groove 6221 serves as a flattening surface 6223 for flattening the tab. So, at the in-process that two pressure heads 622 are close to the both ends of electric core gradually and compress tightly, the one end that electric core D was kept away from to utmost point ear firstly gets into in the holding groove 6221, then presses plane 6223 and utmost point ear contact, until inwards flattening to with utmost point ear with the tip laminating of electric core D.

Further, the side wall of the housing groove 6221 serves as an inclined guide surface 6222 for guiding the tab into the housing groove 6221. That is, the flat surface 6223 serves as a bottom wall, and the inclined guide surface 6222 serves as a side wall, which together enclose the receiving groove 6221. The inclined guide surface 6222 is inclined outward with respect to the pressing surface 6223 so that the housing groove 6221 is formed in a trumpet shape. Thus, in the process that the two pressing heads 622 gradually approach to the two ends of the battery cell D and are pressed, one end, away from the battery cell D, of the tab first contacts with the inclined guide surface 6222, and further enters the accommodating groove 6221 under the guide effect of the inclined guide surface 6222 until the flattened surface 6223 is pressed on the end surface of the battery cell D. The inclined guide surface 6222 prevents the tab from being crushed due to the fact that the tab cannot enter the receiving groove 6221.

In particular embodiments, each ram 622 further includes a platen driver 621, the platen driver 621 being mounted to the mounting bracket 61, and the ram 622 being mounted to the driving end of the platen driver 621 such that the platen driver 621 can drive the ram 622 toward and away from the other ram 622. So, when transfer chain 50 carried electric core to the passageway that flattens, two driving piece 621 that flatten drive two pressure heads 622 respectively and be close to each other, until compressing tightly the both ends of this electric core to utilize face 6223 that flattens to flatten the utmost point ear of electric core tip. After the flattening is completed, the two flattening driving members 621 respectively drive the two pressing heads 622 to move away from each other, so as to separate from the battery core, so that the battery core continues to move downstream along with the conveying line 50. Alternatively, the platen drive 621 may be an air cylinder.

Specifically to the embodiment, the flattening device 60 further includes a clamping assembly 63 installed on the fixing frame 61, and the clamping assembly 63 is used for clamping the electric core passing through the flattening channel. So, when transfer chain 50 carried the electric core to the passageway that flattens, utilize centre gripping subassembly 63 to carry out the centre gripping to this electric core to fixed electric core. Then, the two flattening driving members 621 respectively drive the two pressing heads 622 to approach each other until the two ends of the cell are pressed, and the tabs at the ends of the cell are flattened by the flattening surfaces 6223. After the flattening is completed, the two flattening driving members 621 respectively drive the two pressing heads 622 away from each other, so as to separate from the battery core. The clamping assembly 63 then releases the cell so that it continues to follow the conveyor line 50 downstream.

Optionally, the clamping assembly 63 includes a clamping jaw cylinder 631 and a clamping jaw 632 mounted at a driving end of the clamping jaw cylinder 631, and the clamping jaw cylinder 631 can drive the clamping jaw 632 to clamp or unclamp the electric core passing through the flattening channel. Of course, in other embodiments, other clamping structures may be adopted as long as the cell can be clamped or unclamped.

Referring to fig. 1, in an embodiment, the winding apparatus further includes a first membrane unwinding device 80a for unwinding the first membrane to the winding needle 21 and a second membrane unwinding device 80b for unwinding the second membrane to the winding needle 21. The first pole piece a, the first diaphragm, the second pole piece b and the second diaphragm are sequentially stacked and wound on the winding needle 21, and a battery cell is formed.

In a specific embodiment, the winding apparatus further includes a first feeding device 70a disposed between the first tab folding device 30a and the winding device 20, and a second feeding device 70b disposed between the second tab folding device 30b and the winding device 20. The first feeding device 70a is used for inserting the first pole piece a into the winding needle 21, and the second feeding device 70b is used for inserting the second pole piece b into the winding needle 21, so that the winding needle 21 can wind the four layers of material tapes and form the battery core. It should be noted that the structures of the first feeding device 70a and the second feeding device 70b are not limited herein, as long as feeding can be realized.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (13)

1. A winding apparatus, characterized by comprising:

the first pole piece unreeling device is used for unreeling a first pole piece downstream and outputting the first pole piece, and the first pole piece is provided with a first side face and a second side face which are deviated from each other;

the first pole piece folding device is arranged at the downstream of the first pole piece unreeling device and comprises a first mounting frame, a first shaping roller and a second shaping roller which are parallel to each other and are rotatably arranged on the first mounting frame, a first rolling gap for the first pole piece and the pole lugs on the first pole piece to pass through is formed between the first shaping roller and the second shaping roller, and the first shaping roller and the second shaping roller jointly extrude the pole lugs on the first pole piece passing through the first rolling gap so as to bend the pole lugs on the first pole piece towards one side of the first pole piece with the second side face; and

and the winding device is arranged at the downstream of the tab folding device and is provided with a winding needle for winding the first pole piece and forming the battery core.

2. The winding apparatus according to claim 1, characterized in that the first tab arrangement further comprises a first guide block arranged on an upstream side of the first rolling gap;

first guide block has one and is used for leading the first guide face of leading to the utmost point ear on the first pole piece along the way, first guide face inclines relatively along the plane at first pole piece place along the way, the upstream end of first guide face is located first pole piece along the way and has one side of first side, the downstream end of first guide face is located first pole piece along the way has one side of second side.

3. The winding apparatus according to claim 2, wherein the first guide block further has a first guide surface connected to a downstream end of the first guide surface, the first guide surface being located on a side of the passing first pole piece having the second side surface and being parallel to a plane on which the passing first pole piece is located.

4. The winding equipment according to claim 1, characterized in that, first tab device is still including arranging the first guide block of the upstream side in first rolling clearance, first guide block have with the first smooth curved surface of utmost point ear sliding fit on the first pole piece on route, first smooth curved surface is used for leading gradually to the one side slope that has the second side towards first pole piece with utmost point ear on route.

5. The winding apparatus according to claim 1, characterized in that it further comprises a second pole piece unwinding device arranged upstream of said winding device for unwinding an output second pole piece towards said winding device, and a second tab folding device, said second pole piece having a third side and a fourth side facing away from each other;

the second pole piece device of folding arrange in the second pole piece put the coiling mechanism with between the coiling mechanism, and include the second mounting bracket and be parallel to each other and all rotationally set up third shaping roller and fourth shaping roller on the second mounting bracket, third shaping roller with form the second roll pressure clearance that supplies the utmost point ear on second pole piece and the second pole piece to pass through between the fourth shaping roller, third shaping roller with fourth shaping roller extrudees jointly by utmost point ear on the second pole piece that the second roll pressure clearance passes through to have utmost point ear on the second pole piece towards the second pole piece one side bending of fourth side.

6. The winding apparatus according to claim 5, characterized in that the second tab device further comprises a second guide block arranged upstream of the second rolling gap;

the second guide block is provided with a second guide surface used for guiding the electrode lug on the second pole piece passing through, the second guide surface is inclined relative to the plane where the second pole piece passing through is located, the upstream end of the second guide surface is located on the side where the second pole piece passing through is provided with the third side surface, and the downstream end of the second guide surface is located on the side where the second pole piece passing through is provided with the fourth side surface.

7. Winding apparatus according to claim 6, wherein the second guide block further has a second guide surface connected to the downstream end of the second guide surface, the second guide surface being on the side of the passing second pole piece having the fourth side and being parallel to the plane of the passing second pole piece.

8. The winding apparatus according to claim 5, characterized in that the second tab device further comprises a second guide block arranged on the upstream side of the second rolling gap, the second guide block having a second smooth curved surface in sliding fit with the tab on the passing second tab, the second smooth curved surface being adapted to gradually guide the passing tab to incline towards the side of the second tab having the fourth side.

9. The winding device according to any one of claims 1 to 8, characterized in that the winding device further comprises an air blowing device arranged corresponding to the winding needle, wherein the air blowing device is used for blowing air to the tab of the cell end on the winding needle so as to provide pressure for bending the tab of the cell end inwards.

10. The winding apparatus according to claim 9, wherein the blowing device includes a position adjustment mechanism and a blowing member mounted on the position adjustment mechanism, and the position adjustment mechanism is capable of adjusting a distance between the blowing member and the winding needle in a radial direction to gradually increase according to a radial dimension of the electrical core on the winding needle.

11. The winding apparatus according to claim 10, wherein the position adjustment mechanism comprises a fixed seat, a movable seat, a pressing roller and an elastic member;

the moving seat is movably connected to the fixed seat, the air blowing piece is installed on the moving seat, and the pressing roller is rotatably connected to the moving seat and used for pressing against the winding needle;

the movable seat can drive the pressing roller and the air blowing piece to be close to or far away from the winding needle, and the elastic piece is connected with the fixed seat and the movable seat to provide pre-tightening force for driving the pressing roller and the air blowing piece to be close to the moving trend of the winding needle.

12. The winding equipment according to any one of claims 1 to 8, further comprising a cell blanking device, a conveying line and a flattening device;

the battery cell blanking device is used for blanking the battery cell on the winding needle to the conveying line, and the conveying line is used for conveying the battery cell;

the flattening device also comprises a fixed frame arranged on the conveying line and two flattening components arranged on the fixed frame, and a flattening channel for the power supply core to pass through is formed between the two flattening components;

two one side that the subassembly that flattens each other moves towards all has a pressure head, and two the subassembly that flattens the pressure head can be close to each other with controlling to compress tightly the way the both ends of the electric core of passageway flatten, in order to utilize two the pressure head flattens the utmost point ear at electric core both ends respectively.

13. The winding apparatus according to claim 12, wherein the flattening device further comprises a clamping assembly mounted on the fixture for clamping the cell secured to the flattening channel.

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